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Title: A new direction for dark matter research: intermediate-mass compact halo objects

Journal Article · · Journal of Cosmology and Astroparticle Physics
 [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Summerheights, Oxford (United Kingdom)

The failure to find evidence for elementary particles that could serve as the constituents of dark matter brings to mind suggestions that dark matter might consist of massive compact objects (MACHOs). In particular, it has recently been argued that MACHOs with masses > 15M may have been prolifically produced at the onset of the big bang. Although a variety of astrophysical signatures for primordial MACHOs with masses in this range have been discussed in the literature, we favor a strategy that uses the potential for magnification of stars outside our galaxy due to gravitational microlensing of these stars by MACHOs in the halo of our galaxy. In conclusion, we point out that the effect of the motion of the Earth on the shape of the micro-lensing brightening curves provides a promising approach to testing over the course of next several years the hypothesis that dark matter consists of massive compact objects.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1559922
Report Number(s):
LLNL-JRNL-777554; 970107; TRN: US2000428
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 11; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (19)

Primordial black hole dark matter and LIGO/Virgo merger rate from inflation with running spectral indices: formation in the matter- and/or radiation-dominated universe journal November 2018
Primordial black holes as generators of cosmic structures journal May 2018
Primordial black hole abundance from random Gaussian curvature perturbations and a local density threshold journal December 2018
Primordial black hole constraints for extended mass functions journal July 2017
Prospective constraints on the primordial black hole abundance from the stochastic gravitational-wave backgrounds produced by coalescing events and curvature perturbations journal May 2019
Constraints on the Primordial Black Hole Abundance from the First Advanced LIGO Observation Run Using the Stochastic Gravitational-Wave Background journal May 2018
Remarks on dark matter constituents with many solar masses journal September 2018
Tests of gravity theories with Galactic Center observations journal October 2019
LSST: From Science Drivers to Reference Design and Anticipated Data Products journal March 2019
LSST: from Science Drivers to Reference Design and Anticipated Data Products text January 2008
Constraints on the Primordial Black Hole Abundance from the First Advanced LIGO Observation Run Using the Stochastic Gravitational-Wave Background text January 2016
Primordial black hole constraints for extended mass functions text January 2017
Primordial Black Hole Dark Matter and LIGO/Virgo Merger Rate from Inflation with Running Spectral Indices: Formation in the Matter- and/or Radiation-Dominated Universe text January 2018
Sensitivity of primordial black hole abundance on the reheating phase journal August 2018
On the origin and nature of dark matter journal November 2018
PBH abundance from random Gaussian curvature perturbations and a local density threshold text January 2018
Dark Matter Gravity Waves at LIGO and LISA text January 2018
Does CMB Distortion Disfavour Intermediate Mass Dark Matter? preprint January 2020
Ultralight Axions Versus Primordial Black Holes text January 2021

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